Woah, that's an egg. what do i do?!

Posted a while back about my crested not eating. Checked her cage tonight and there is an egg in the bottom of the cage. She is perched on a leaf right now with her bottom hanging off. Looks like she may have another one. I have emailed the breeder to see if there was any way she was ever with a male. Can they lay unfertile eggs? I am not sure what to do. I'm worried about her too. Should I do anything for her?

I know with leopards they can lay unfertile eggs.

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Cresties can lay infertile eggs.

Cresteds can lay infertile eggs but usually they lay two. Wait for a day or so and then consider taking her to the vet.